The proposed work on the 82-year-old course, designed by famed architect Alister Mackenzie, involves clearing reeds and sediment from a pond and waterway, construction around a pumping station and the installation of a new, small pond on the course.

Environmentalists led by the Wild Equity Institute say the work will disturb the threatened California red-legged frog and San Francisco garter snake. The Institute made another effort to force the parks department to conduct a full environmental impact of the project.

The Recreation and Park Commission and the Planning Commission have already approved the work. Lisa Wayne, open space manager for San Francisco’s Recreation and Park Department, which runs the course, said that the project will affect less than one of Sharp Park’s 417 acres.

It is now expected that opponents of the course will file a lawsuit objecting to the city’s decision, Wild Equity Institute Executive Director Brent Plater told the Chronicle.